What the hell does the Overton Window have to do with corruption? Corruption isn't limited to one political party, and I'm willing to bet 95% of the people read

What the hell does the Overton Window have to do with corruption? Corruption isn't limited to one political party, and I'm willing to bet 95% of the people reading this have no idea how to even apply the Overton Window to South African politics. The only thing I can take from this is that the GP meant "yeah we all know Africans are corrupt, DUH, but we can't say it because of political correctness." I don't know that that's what he meant, but when you're like "well we could discuss the root of this but it's recently become socially unacceptable to do so" of course people are going to assume the worst thing possible.